How does a flask know when?!
Answers: to keep drinks hot or cold?
i don't think i understand the question but it reminds me of this kind of coffee brewing : http://www.sweetmarias.com/prod.brewers....
http://www.sweetmarias.com/yama_vacuum_b...
it still amazes me.
It doesn't LOL
it just keeps the original temp
becasue no other air gets out or in,
It reflects back whatever the temperature of the inside liquid is.
It insulates (using a vacuum) from the outside temperature - which will undoubtably be warmer than something you want cold, or colder than something you want hot!
It doesn`t. The vacuum between the inner and outer flask keeps the contents at the same temperature as when it was poured in.
it maintains the current temperature by preventing heat conduction either cold or hot from the surroundings it is in.
Insulation works for both hot and cold.
You have to tell it what to do.
when the beakers nipples are hard
???
Your search: flask
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flask n.
Dewar flask n.
Erlenmeyer flask n.
Florence flask n.
vacuum flask n.
vacuum flask
NOUN:
See vacuum bottle
More foreign terminology..
In the New World USA we call it a thermos..
a flask here is a small metal container to hold a liquor
flask
NOUN:
1: A small container, such as a bottle, having a narrow neck and usually a cap, especially:
2: A flat, relatively thin container for liquor.
3: A container or case for carrying gunpowder or shot.
4: A vial or round long-necked vessel for laboratory use.
5: A frame for holding a sand mold in a foundry